Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3SO callsign genealogy
Currently held by KESSEL, WILLIAM M
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by W3SO's current licensee, walking backwards.
- KB3EULcancelledWopsononock Mountaintop OperatorsMDgranted 2000-04-13cancelled 2000-05-16
Successor callsigns
Callsigns held now by people who previously held W3SO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3SO, oldest first.
- KESSEL, WILLIAM M FL1988-04-26 → cancelled 2000-04-27
- Wopsononock Mountaintop Operators PA2020-03-06 active